Question

Express cos^2 x in terms of cos2x

Answer 1

cos2x = 2 cos^2 x - 1

Answer 2

\[\cos^ x=\frac{ (1+ \cos 2x) }{ 2 }\]

Answer 3

* cos^2 x

Answer 4

in the left side

Answer 5

Wow that was really quick. Thanks to both of you, Im going to look it over now.

Answer 6

:) YW

Answer 7

Thanks, I understand it now.

Answer 8

:)